Gage protector valve



Feb. 25, 1958 w. MASON ETAL GAGE PROTECTOR VALVE Filed Jan. 4, 1955 xi /6 2a 3a 33 5 sTEPHEN fit gEi fiO WALKER MASON ATTORNEY BY, a

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GAGE PROTECTOR VALVE Providence, R. I., and Stephen J. Biello,

Walker Mason,

American Associates Inc.,

Somerset, Mass, assignors t Providence, R. 1., a corporation 0 Application January 4, 1955, Serial No. 479,834 2 Claims. (Cl. 137--505.13)

age protector and more d with a choke coil for and excessive pressures m reaching the pressure indicat- This invention relates to a g particularly to a valve associate dampening and stopping in a hydraulic system fro f the present invention is to provide in combination with a choke coil f pressure in a hydraulic system geto indicate a false One of the objects 0 a gage protector valve for preventing surges o from causing the needle of the ga pressure reading.

Another object o ector valve in corn f the present invention is to provide a bination with a choke coil igh amplitude surges from reaching the whereby the surges of pressure beyond its reading limits and bjectof the present invention is to valve in combination with a off or block out at a predeterlimits of the gag Other objects of the present i out in part and become apparent in par specification and claims.

st surge dampening various types of choke c reciprocating plugs have Applicant provides a un1 ciprocating plug combined in one stru in high pressure hydraulic systems.

g complement each other. herein depicted is the subject of, a patent Serial #316,412 filed valves have incorporated oil or in an independent structure been used in valve construction. que choke coil and a unique recture for special use The choke coil and reciprocating pin The choke coil 11 by the same inventors,

3, 1952 for a Gage Dampening Device, now

Like reference characters refer to like parts in the accompanying drawing,

Figure 1 is a longitu new and improved gage pro Figure 2 is similar to valve plug is shown in c Figure 3 is a transverse, taken along line 3-3 of Figure 2.

Figure 4 is a trans section as taken along In proceeding with t ures of the drawing W generally indicate tector valve combined with a chok body 11 having a cross m formed therewith bore 13 communicatin adjusting scre stepped bore stepped bore 13 wit 16 and adjusting screw is provided in a portio ment 2t) is termed in s dinal, medial sectional view of the except the reciprocating losed or operative position.

longitudinal, sectional view itudinal, view partly in line 44 of Figure 2.

his invention reference is had to herein reference character s the new and improved gage pro- A longitudinal in the form of a T is provided with a stepped g with a transverse bore unted in one end of w 15 is threadedly mo 13. A stem 16 is s h a spring 17 interposed between stem 15. A longitudinal passage 18 ore 13. An abuttepped bore 13 as a stop limiting lidably mounted in n of stepped b ice ber 21 abutting wall 23. Washer 25 serves the function of a valve seat. A valve or reciprocating plug 27 is provided with a shank having a collar 28 which slidably en gages longitudinal passage 18, on one end and a head 30, provided with a seating ring 31,'on the other end. Seating ring 31 engages and disengages washer 25. Collar 28 is provided with a recess 29 which retains an O ring 9 engageable with longitudinal passage 18. Head 30 is provided with a serrated edge 22.

Transverse bore 14 has a disk 32 provided with a multiple number of ports 33 fixed in one end at the juncture of transverse bore 14 with stepped bore 13. A screen 34 is fixed to disk 32 in such a manner as to provide a shallow well 35 between'the screen 34 and the disk 32. bushing 3'6.is placed in transverse bore 14 with one end abutting disk 32. The other end of transverse bore 14 is provided with a threaded area 37 which is larger in diameter than the diameter of the bore 14 which retains bushing 36. A groove 38 is provided in the outer end of threaded area 37. A cap 40, T-shaped, is provided with a recess 42 which retains an 0 ring 41 engageable with groove 38. On one side of recess 42 threads are provided to engage threaded area 37. On the other side of recess 42 the cross arm 43 of the T abuts the end of cross member 12.

Axially cap 40 is provided with pipe threads 44 to which a hydraulic pressure gage may be secured. Below pipe threads 40 a well head 45 is provided. A choke coil 46 has one end fixed in cap 40 and in communication with well head 45. The other end of choke coil 46 is fixed in disk 32 and in communication with shallow well 35. Choke coil 46 is located in cavity 47 formed by disk 32, the bottom of cap 40 and the inside walls of bushing 36.

Inoperation fluid under pressure will enter chamber 21 with the several parts of the mechanism in the positions shown in Figure 1; Adjusting screw 15 will have been set to tension spring 17 a predetermined amount, so that spring 17 through stem 16 acting on valve 27 will position head 30 and seating ring 31 away from valve seat 25. The fluid will flow through serrations 22 and the passageway in washer valve seat 25 into longitudinal passage 18. Neoprene O ring 9 will prevent passage of the fluid beyond collar 28. The threads of adjusting screw 15 are sufliciently loose to prevent air from being trapped in stepped bore 13.

The fluid will flow through screen 34 into shallow well 35 where it will divide into two directions. It will flow through ports 33 into cavity 47 where it will surround the convolutions of choke coil 46 and act as a cushioning medium in resisting flexing of the choke coils 46. O ring 41 will prevent fluid passing beyond recess 42. Fluid will also pass into choke coil 46 from shallow well 35 and travel to well head 45 from whence it can proceed to a pressure gage mounted in threads 44.

Should surges or fluctuations of fluid be present in the fluid, choke coil 46 will dampen or remove the surge before it reaches well head 45 so that the surge will not be recorded on the gage. The surge or fluctuation in that event must not exceed the pressure setting of spring 17.

In the event a surge or the static pressure of the fluid exceeds the setting of spring 17; then valve 27 through the action of the fluid pressure on head 30 will oppose the tension of the springuntil seating ring 31 engages valve seat 23 thereby blocking passage-of chamber 21. The gage mounted in threads 44 cannot be damaged or driven beyond the limits of its reading as determined by the setting of spring 17. The gagewvillal ways record the uniform static pressure of the*fl uidbelow the predetermined pressure set up in spring 17 by1adjust= ing screw 15.

Having shown and described a preferred embodiment of the present invention; by way of example, but realizing that structural changes could be made and other examples given without departing from either the spirit or scope of this invention.

What I claim is:

1. A gage protector valve comprisinga body having a stepped bore and a transversemember having a bore communicating with the stepped bore, a reciprocating plug located in said-stepped bore provided with a recess in'one end and a seating ring and a serrated edge in'the other end, said transverse bore being located between said recess and said seating ring, an O ring, said recess housing said O ring in fluid tight relationship with said stepped bore, a valve seat in said stepped bore;said seating ring in said reciprocating plug engaging'and disengaging said valve seat, an adjusting screw rotatively engaging said stepped bore in air vent relationship, a spring located in said stepped bore between said adjusting screw and said reciprocating plug to urge said reciprocating plug and seating ring away from said valve seat, a disk provided with a port secured in said bore at theintersection of said bore and said stepped bore, a cap secured in said bore and axially provided with threads terminating in a well head, a cavity located between said disk and the base of said cap, a choke coil located in said cavity with one end of said coil fixed to communicate with said well head and the other end of said coil fixed to and extending'through said disk whereby fluid under pressure entering one end" of said stepped bore engages an end of said reciprocating plug to act against the tension of said spring before bypassing said end to pass through said serrations and said valve seat to and through said choke coil to said well head and through said port to said cavity to surround said choke coil.

2. A gage protector valve comprising a body having a stepped bore and a transverse integral member having a bore communicating with the stepped bore, alongitudinal passage formed within said stepped bore and extending either side of the intersection of said bore, a valve seat fixed in said stepepd bore, an adjusting screw located in one end of said stepped bore, a stop in said stepped bore the fluidbeyondmounted in said stepped borebetween'said longitudinal passage and said adjusting s'crew, a resilient member located in said stepped bore between said stem and said adjusting screw and acting to force said stem away from said adjusting screw and against said stop, a reciprocating plug slidably mounted in said longitudinal passage and having collar provided with means to form a fluid tight seal with said longitudinal passage'and'a head having serrations in the edge of the head with a seating ring in one face of the head, said ring engaging said valve seat under the influence of fluid pressure acting-on the face of the head opposite to the seating ring and against the tension of said resilient means forcing said stem against said collar, a cap secured insaid bore and having means to form a fluid tight seal with said bore, said cap being axially provided with threads, a well head at the base of said threads, a disk provided with a.p0rt secured in said bore at the intersection of said bore and said stepped bore, a screen fixed to the end of said diskand forming a shallow well between the screen and end of the disk, a bushing fixed in said bore between saiddisk andsaid cap to hold said disk in position in said bore, a cavity formed in said bushing between said disk and said cap, a choke coil located in said cavity with one end fixed in said disk to communicate with said shallow well and the other end fixed in said cap to communicate with said well head, a thread in one end of said stepped bore to be attached to theconduit of a hydraulic system, a chamber. formed between said threads and said valve seat whereby fluid under pressure from the hydraulic system enters saidchamber and acting on the head of said reciprocating plug bypasses the serrations to enter said longitudinal passage and pass through said screen to said choke coil and through said port to said cavity to surround said choke coil so that the fluid offers resistance to the flexing of said choke coil when the fluid pressure is below the resistance of said resilient member.

References Cited in the file of this patent UNITED STATES PATENTS 1,143,639 Loomis June 22, 1915 1,622,843 Price Mar. 29, 1927 1,941,613 McDonell Jan. 2, 1934 2,353,191 Samarian July 11, 1944 2,498,366 Greer Feb. 21, 1950 FOREIGN PATENTS 601,752 Great Britain May 12, 1948 

